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Model specific boards => Golf mk5 => Topic started by: fireman sam on 08 October 2011, 20:42

Title: Coolant light
Post by: fireman sam on 08 October 2011, 20:42

Hi guys, not been on in an eternity, the mk4 is long gone , so is the first mk5 and the mk6...

Currently running a 55 mk5 poverty spec s model.

Coolant light has come on, on the mrs just now, going to investigate in the morning

Red light, bong and light flashing,

Does this sound like like the sensor activating for a low level?

Cheers lads

Title: Re: Coolant light
Post by: bacillus on 08 October 2011, 23:34

 is the coolant level ok?

Title: Re: Coolant light
Post by: Snooze on 09 October 2011, 09:01

If the warning light is going off and the coolant level is fine, then you need a new coolant expansion bottle. Its a common problem, had mine replaced last yr.

Title: Re: Coolant light
Post by: fireman sam on 09 October 2011, 09:24

Just checked the bottle in the  light and the level was low. Topped with 50/50 antifreeze/ water.

However now I need the find the leak...

What are most likely causes

Title: Re: Coolant light
Post by: Primus84 on 09 October 2011, 09:48

My coolant sensor is faulty too, what was the cost to replace the expansion tank?

Title: Re: Coolant light
Post by: Snooze on 09 October 2011, 10:18

Luckily my car was still under warranty so it was free!

Title: Re: Coolant light
Post by: robby on 09 October 2011, 21:29

My last MK5 and A3 both had leaking radiators - common problem as they leak from the bottom corners  :sad:

Title: Re: Coolant light
Post by: seiko on 09 October 2011, 21:47

You could have a look around the black water flange on the right hand side of the engine block just opposite the battery, known problem to have leak there on a mk5:

Title: Re: Coolant light
Post by: AlanD on 10 October 2011, 11:16

Quote from: seiko on 09 October 2011, 21:47

You could have a look around the black water flange on the right hand side of the engine block just opposite the battery, known problem to have leak there on a mk5:

Yep, what he said. I had this problem on mine it was fixed by VW under warranty - http://www.golfgtiforum.co.uk/index.php?topic=100997.0

Title: Re: Coolant light
Post by: fireman sam on 10 October 2011, 20:52

Thanks for all the replies...

Checked the level first thing and after work tonight..

No drop in level, so it must be a fairly slow leak.

Going to keep an eye on it and check all your guys suggestions ASAP

Cheers